Visit the famous Cu Chi tunnels, a bewildering maze of underground passages, chambers, rooms and booby traps used by both the Vietminh and the Viet Cong to suddenly materialise as if from nowhere, launch a lightning ambush, and vanish equally rapidly. After lunch, return to Ho Chi Minh City in good time for your flight to Phnom Penh, Cambodia, where you’ll be met and driven to your hotel for the night.